Because, you know, everyone loooves baggage fees:
The higher fees take effect Tuesday for Delta passengers who booked their flights Jan. 5 or later and are checking bags on domestic flights. For those who pay the baggage fees when they check in online, the fees will be $23 for the first checked bag and $32 for the second checked bag. Those who pay the baggage fees at the airport ticket counter, kiosk or curbside will pay $25 for the first checked bag and $35 for the second.